Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 19, 2025
Abstract
Mn‐based
oxide
cathodes
hold
great
promise
for
sodium‐ion
batteries
(SIBs)
due
to
their
cost‐effectiveness
and
environmental
compatibility.
In
this
study,
using
tunnel‐type
Na
0.44
MnO
2
as
a
prototype,
systematic
investigation
is
conducted
examine
how
different
element
substitutions
affect
structural
evolution
found
that
these
alter
the
total
energy
of
pristine
system,
driving
structure
evolve
gradually
from
tunnel
crystal
configuration.
Notably,
advanced
scanning
transmission
electron
microscopy
(STEM),
transition
zone
captured
layered
first
time,
providing
direct
evidence
phase
evolution.
Density
functional
theory
(DFT)
calculations
reveal
Mg
substitution
uniquely
facilitates
formation
layered/spinel
heterostructures,
enabling
intimate
interfacial
integration
reduces
Na⁺
transport
barriers
enhances
integrity.
COMSOL
simulations
further
demonstrate
configuration
effectively
mitigates
stress
accumulation,
achieving
high
rate
long
cycle
performance.
These
findings
provide
comprehensive
design
principles
dynamic
cathodes,
thereby
advancing
high‐performance
SIBs.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Sodium‐ion
batteries
(SIB),
stemming
from
the
abundance
of
sodium
resources
and
their
cost‐effectiveness,
have
positioning
them
favorably
a
potential
candidate
for
stationary
energy
storage
public
electric
vehicles.
As
an
intermediary
grid
system
output
terminals
charging
station,
fast‐charging
performance
has
actually
become
crucial
metric,
which
greatly
relates
to
station
utilization
cost‐
time‐efficient.
Besides,
capacity
is
also
relevant
long‐term
stable
operation
transportation.
Given
remarkable
advancements
in
SIBs
reported
recently,
review
about
this
topic
scope
timely
important
at
present.
In
study,
bottlenecks
are
first
assessed,
after
that,
comprehensive
overview
employed
strategies
improving
capacities
three
aspects:
structures
design,
reaction
mechanism
regulation,
optimization
solvation
structure
interfacial
property
given.
Finally,
challenges
prospects
further
research
toward
proposed.
The
authors
hope
will
provide
deep
understanding
design
principles
inspire
more
endeavors
conquer
practicability
issue
fields.
Nanoscale,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Residual-alkali-derived
Na
2
Ti
3
O
7
coatings
boost
electrolyte
wettability
and
electrochemical
performance
of
a
layered
oxide
cathode
for
sodium-ion
batteries.
ChemElectroChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 18, 2025
Abstract
Biphasic
layered
cathodes
represent
a
strategic
advancement
in
overcoming
the
inherent
limitations
of
single‐phase
materials
by
synergistically
integrating
distinct
phase
characteristics.
Among
these,
P2/O3
biphasic
cathode
stands
out
due
to
its
integration
rapid
diffusion
kinetics
P2
with
high
capacity
O3
phase,
resulting
superior
battery
performance.
Given
critical
role
ratio
determining
performance
cathodes,
this
work
systematically
examines
influence
synthesis
methods,
sintering
temperatures,
and
sodium
dopant
compositions
on
modulation.
A
comprehensive
analysis
kinetic
thermodynamic
properties
is
conducted,
findings
correlated
electrochemical
data
elucidate
how
stability
efficient
contribute
enhanced
functionality.
Finally,
brief
overview
other
provided,
comparing
their
distinctive
relative
those
system.
Layered
oxides
are
considered
promising
cathode
materials
for
sodium-ion
batteries
(SIBs)
due
to
their
high
energy
density,
flexible
compositions,
and
low
cost.
However,
they
encounter
significant
challenges,
such
as
multiphase
transitions
structural
instability
at
voltages,
which
limit
large-scale
practical
application.
In
this
study,
we
employed
a
dual
modification
strategy
involving
complex
composition
doping
phosphate
coating
fabricate
the
Na0.67Ni0.255Mn0.645(TiMgCuZn)0.1O2@phosphate
(D-NNM).
The
lattice
distortion
induced
by
optimizes
overall
properties
of
cathode,
while
forms
robust
electrode
interface
through
stable
P-O
bonds.
This
comprehensive
stabilizes
phase
interfacial
structure,
thereby
enhancing
Na+
transport
mitigating
mechanical
degradation
surface
reactions
voltages.
Consequently,
D-NNM
exhibited
an
initial
capacity
136.9
mA·h·g-1
with
average
potential
3.45
V
maintained
85%
after
60
cycles
4.4
V,
twice
that
pristine
cathode.
demonstrated
faster
diffusion
kinetics
voltage
without
any
particle
cracks
observed
even
50
cycles.
offers
protection
layered
from
bulk
provides
insights
into
design
density
cathodes
SIBs.
